Electric current plug and receptacle



April 2g, E, KAKjE-s 2,239,787

ELECTRIC CURRENT PLUG AND RECEPTA-CLE Filed March 29, 1940 EDWARD mzr's.

Patented Apr. 29,4941

ELECTRIC CURRENT PLUG AND RECEPTACLE Edward Kakes, Antigo, Wis. Application March 29, 1940, Serial No. 326,796

3 Claims.

sible to complete a; quick and efficient connection or closure of the two units, for permitting the flow of a current.

With the foregoing and other objects in view, the invention comprises certain novel constructions, combinations, and arrangements of parts as will hereinafter be fully described, illustrated in the accompanying drawing, and more particularly pointed out in the appended claims.

In the drawing:

Figure 1 is a longitudinal sectional view of a receptacle or socket unit, constructed in accordance with the present invention.

Figure 2 is a. view partly in elevation and partly in longitudinal section of a plug unit, constructed n accordance with the present invention.

Figure 3 is a view in elevation of the inner face of the plug unit.

Figure s is a view in elevation of the inner face of the receptacle or socket unit.

Figure is a view partly in elevation and partly in longitudinal section of the two units of the device, in an. assembled position.

Referring to the drawing, in which the preferred embodiment of the invention is shown, I designates the receptacle or socket unit, which is preferably constructed oi? insulating material.

The socket unit i is provided with a central aperture 2, in a portion of which is a cylindrical casing 3. This casing 3 is provided on its outer end with an annular flange 4; said flange 4 is embedded or countersunk in the outer face of the socket unit. The casing 3 is provided at its nner end with an annular flange 5 against which rests the contact plate 8. Connected to contact plate 6 is current conductor 1. On the outer face of the socket unit I is a curved or spiral-like groove 8 (Fig. 4) that terminates at its inner end in a curved socket 9. In socket 3 is a contact plate I. A current conductor H is connected to plate it; this conductor It extends through passage l2, which passagecommunicates, at one end, with the central aperture 2.

The plug unit I3 is made of insulating mate- I rial, and is provided with a central apenture l4. A metallic, round prong l5 extends at its inner end into plug unit I3 with current con ductor i6 attached thereto. This prong i5 is adapted to fit into the metallic casing 3. A curved contact spring l6 has an outwardly-bowed outer end l1, and an inner angular end 18; angular end l8 extends at substantially right angles into the body of the plug unit l3, with current conductor l9 attached thereto; current conductor l9 extends through the passage 20, as clearly shown in Figure 2.

In operation, when the units of the device are separated, the plug unit is moved toward the socket unit, causing the prong ii to register or enter partly the casing 8, whereupon the end ii r of contact spring 16 will engage the socket unit, and upon rotating the plug unit, end I! will ride into the curved groove 8 and thence will move into the socket 9, until it contacts the plate i8,

I while at the same time the outer end of prong IE will contact plate 6, whereupon a circuit is completed through the device. To separate the units, reverse movement is caused of the plug unit, whereupon the contact spring l6 will move out of socket 9 and groove 8, permitting the operator to deposit the plug unit wherever he desires.

It is to be understood that, in placing'the units together, the bevelled outer end of the round prong I 5 permits easy location of the casing 3, and then by slightly rotating the plug unit, the contact spring will be seated in its closed position (Fig. 5) for completing the circuit.

While I have described the preferred embodiment 01 my invention and illustrated same in the accompanying drawing, certain changes or alterations may appear to one skilled in the art to which this invention relates during the extensive manufacture of same, and I, therefore, reserve the right to make such changes or alterations as shall fairly fall within the .scope of the appended claims.

What I claim is:

1. In a device of the class described, the combination of a socket unit provided with a central aperture, a cylindrical casing in part of said aperture, said cylindrical casing provided on its outer end with an annular flange embedded in said socket unit, said cylindrical casing provided on its inner end with an annular flange, a. contact plate in said cylindrical casing against the flange on the inner end 01' said casing, said socket unit provided in its outer face with a. curved groove and a curved socket at the inner end of said groove, a contact plate in said curved socket, a plug unit provided with a central aperture, an outwardly-pointed round prong extending at its inner end into said last-mentioned aperture, a curved contact spring having an outwardly-bowed outer end, and said curved contact spring provided with an angular inner end extending into said plug unit, substantially as shown and described.

2. In a device of the class described, the combination of a socket unit provided with a casing and with a spiral-like socket, said socket open at its outer end only and partly extending around said casing within said socket unit, plates at the extreme inner ends of said casing and spiral-like socket, a plug unit provided with means for contacting said plates and said contacting means i only making contact when said units are brought together in their extreme contacting or closed position.

3. In a device of the class described, the combination of a socket unit provided with a cylindrical casing, said casing provided at its inner end only with a flat contact plate, said socket unit provided with an inwardly-extending spirallike socket open at its outer end only and said outer end opening upon the outer face of said socket unit, said spiral-like socket extending around said cylindrical casing, contact plates in said cylindrical casing and spiral-like socket, a plug unit provided with a straight prong and a curved contact spring, said prong engaging at its inner end said plate within said cylindrical casing, and said curved contact spring engaging at its inner end said plate within said spiral-like socket, substantially as shown and described.

EDWARD KAKES. 

